Kelsey HigginsonSports Nutrition Coach and Founder at Clutch Day Coaching

If you are taking vitamin d will you comment "👍"? Im curious how many of you are.

10 Nov 2025 · 0 min

Watch on YouTube

0:21

In this brief segment, the speaker explains that vitamin D is primarily synthesized through sun exposure. Athletes who spend several hours outdoors each week, such as cross‑country runners, typically receive sufficient sunlight on exposed skin and therefore likely do not need vitamin D supplementation. Conversely, athletes who train indoors or during winter months, and who do not obtain at least 15–20 minutes of direct sun exposure three times per week, are advised to consider supplementing their vitamin D intake.

Vitamin D comes from the sun, which is really cool. So if your athlete is a cross-country runner and they're in the sun multiple hours a week and they're getting sun exposure on their arms and their face, amazing. They probably don't need to supplement vitamin D. But if you are an inside athlete, if it is winter, if you're not getting at least 15 to 20 minutes of sun 3 times a week, you probably need to be supplementing with vitamin D.